tanh-112+tanh-113 is equal to
tanh-157
tanh-175
tanh-116
tanh-156
Explanation for the correct option:
We know that tanh-1x+tanh-1y=tanh-1x+y1+xy.
So,
tanh-112+tanh-113=tanh-112+131+12×13=tanh-15676=tanh-157
Hence, option (A) is the correct answer.
limh→0{1h3√8+h−12h}is equal to